Ian Wallis was inadvertently omitted as an author in this study. Ian Wallis assisted with the collection of the leaf samples that were used in this study, and built the chambers that the insects were housed in.
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New approaches to tannin analysis of leaves can be used to explain in vitro biological activities associated with herbivore defence.
New Phytol
January 2020
Natural Chemistry Research Group, Department of Chemistry, University of Turku, Turku, FI-20500, Finland.
Although tannins have been an important focus of studies of plant-animal interactions, traditional tannin analyses cannot differentiate between the diversity of structures present in plants. This has limited our understanding of how different mixtures of these widespread secondary metabolites contribute to variation in biological activity. We used UPLC-MS/MS to determine the concentration and broad composition of tannins and polyphenols in 628 eucalypt (Eucalyptus, Corymbia and Angophora) samples, and related these to three in vitro functional measures believed to influence herbivore defence: protein precipitation capacity, oxidative activity at high pH and capacity to reduce in vitro nitrogen (N) digestibility.
View Article and Find Full Text PDFIntraspecific Variation in Nutritional Composition Affects the Leaf Age Preferences of a Mammalian Herbivore.
J Chem Ecol
January 2018
Research School of Biology, The Australian National University, ACT, Canberra, 2601, Australia.
Ecologists have long been interested in how the nutritional composition of leaves changes as they age, and whether this affects herbivore feeding preferences. As a consequence, the literature abounds with reports that younger leaves contain higher concentrations of nitrogen and plant secondary metabolites (PSMs) than do older leaves. Most of these studies, however, base their conclusions on average values that often mean little to herbivores.
View Article and Find Full Text PDFCorrection to: Oxidizable Phenolic Concentrations Do Not Affect Development and Survival of Paropsis Atomaria Larvae Eating Eucalyptus Foliage.
J Chem Ecol
September 2017
Research School of Biology, The Australian National University, ACT, Canberra, 2601, Australia.
Ian Wallis was inadvertently omitted as an author in this study. Ian Wallis assisted with the collection of the leaf samples that were used in this study, and built the chambers that the insects were housed in.
View Article and Find Full Text PDFGenus-wide variation in foliar polyphenolics in eucalypts.
Phytochemistry
December 2017
Research School of Biology, The Australian National University, Canberra, ACT, 2601, Australia.
Many studies quantify total phenolics or total tannins, but understanding the ecological role of polyphenolic secondary metabolites requires at least an understanding of the diversity of phenolic groups present. We used UPLC-MS/MS to measure concentrations of different polyphenol groups - including the four most common tannin groups, the three most common flavonoid groups, and quinic acid derivatives - in foliage from 628 eucalypts from the genera Eucalyptus, Angophora and Corymbia. We also tested for phylogenetic signal in each of the phenolic groups.
View Article and Find Full Text PDFOxidizable Phenolic Concentrations Do Not Affect Development and Survival of Paropsis Atomaria Larvae Eating Eucalyptus Foliage.
J Chem Ecol
April 2017
Research School of Biology, The Australian National University, ACT, Canberra, 2601, Australia.
Insect folivores can cause extensive damage to plants. However, different plant species, and even individuals within species, can differ in their susceptibility to insect attack. Polyphenols that readily oxidize have recently gained attention as potential defenses against insect folivores.
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